diff options
author | Ilya Dryomov <ilya.dryomov@inktank.com> | 2014-03-21 19:05:29 +0200 |
---|---|---|
committer | Sage Weil <sage@inktank.com> | 2014-04-04 21:07:55 -0700 |
commit | ec7af97258396161e6effba7e788c3fc3cb55263 (patch) | |
tree | fc00b89d05b40fadd9dba80fe8c31fc316a605eb /net/ceph | |
parent | 10db634e2083a202a26123d6d4c9ede98d6a1199 (diff) | |
download | linux-stable-ec7af97258396161e6effba7e788c3fc3cb55263.tar.gz linux-stable-ec7af97258396161e6effba7e788c3fc3cb55263.tar.bz2 linux-stable-ec7af97258396161e6effba7e788c3fc3cb55263.zip |
libceph: introduce get_osdmap_client_data_v()
Full and incremental osdmaps are structured identically and have
identical headers. Add a helper to decode both "old" (16-bit version,
v6) and "new" (8-bit struct_v+struct_compat+struct_len, v7) osdmap
enconding headers and switch to it.
Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Diffstat (limited to 'net/ceph')
-rw-r--r-- | net/ceph/osdmap.c | 81 |
1 files changed, 65 insertions, 16 deletions
diff --git a/net/ceph/osdmap.c b/net/ceph/osdmap.c index 6497322d2e3c..be2a65fbd902 100644 --- a/net/ceph/osdmap.c +++ b/net/ceph/osdmap.c @@ -683,6 +683,63 @@ static int osdmap_set_max_osd(struct ceph_osdmap *map, int max) return 0; } +#define OSDMAP_WRAPPER_COMPAT_VER 7 +#define OSDMAP_CLIENT_DATA_COMPAT_VER 1 + +/* + * Return 0 or error. On success, *v is set to 0 for old (v6) osdmaps, + * to struct_v of the client_data section for new (v7 and above) + * osdmaps. + */ +static int get_osdmap_client_data_v(void **p, void *end, + const char *prefix, u8 *v) +{ + u8 struct_v; + + ceph_decode_8_safe(p, end, struct_v, e_inval); + if (struct_v >= 7) { + u8 struct_compat; + + ceph_decode_8_safe(p, end, struct_compat, e_inval); + if (struct_compat > OSDMAP_WRAPPER_COMPAT_VER) { + pr_warning("got v %d cv %d > %d of %s ceph_osdmap\n", + struct_v, struct_compat, + OSDMAP_WRAPPER_COMPAT_VER, prefix); + return -EINVAL; + } + *p += 4; /* ignore wrapper struct_len */ + + ceph_decode_8_safe(p, end, struct_v, e_inval); + ceph_decode_8_safe(p, end, struct_compat, e_inval); + if (struct_compat > OSDMAP_CLIENT_DATA_COMPAT_VER) { + pr_warning("got v %d cv %d > %d of %s ceph_osdmap client data\n", + struct_v, struct_compat, + OSDMAP_CLIENT_DATA_COMPAT_VER, prefix); + return -EINVAL; + } + *p += 4; /* ignore client data struct_len */ + } else { + u16 version; + + *p -= 1; + ceph_decode_16_safe(p, end, version, e_inval); + if (version < 6) { + pr_warning("got v %d < 6 of %s ceph_osdmap\n", version, + prefix); + return -EINVAL; + } + + /* old osdmap enconding */ + struct_v = 0; + } + + *v = struct_v; + return 0; + +e_inval: + return -EINVAL; +} + static int __decode_pools(void **p, void *end, struct ceph_osdmap *map, bool incremental) { @@ -798,7 +855,7 @@ static int decode_new_pg_temp(void **p, void *end, struct ceph_osdmap *map) */ static int osdmap_decode(void **p, void *end, struct ceph_osdmap *map) { - u16 version; + u8 struct_v; u32 epoch = 0; void *start = *p; u32 max; @@ -807,15 +864,9 @@ static int osdmap_decode(void **p, void *end, struct ceph_osdmap *map) dout("%s %p to %p len %d\n", __func__, *p, end, (int)(end - *p)); - ceph_decode_16_safe(p, end, version, e_inval); - if (version > 6) { - pr_warning("got unknown v %d > 6 of osdmap\n", version); - goto e_inval; - } - if (version < 6) { - pr_warning("got old v %d < 6 of osdmap\n", version); - goto e_inval; - } + err = get_osdmap_client_data_v(p, end, "full", &struct_v); + if (err) + goto bad; /* fsid, epoch, created, modified */ ceph_decode_need(p, end, sizeof(map->fsid) + sizeof(u32) + @@ -943,15 +994,13 @@ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end, __s32 new_flags, max; void *start = *p; int err; - u16 version; + u8 struct_v; dout("%s %p to %p len %d\n", __func__, *p, end, (int)(end - *p)); - ceph_decode_16_safe(p, end, version, e_inval); - if (version != 6) { - pr_warning("got unknown v %d != 6 of inc osdmap\n", version); - goto e_inval; - } + err = get_osdmap_client_data_v(p, end, "inc", &struct_v); + if (err) + goto bad; /* fsid, epoch, modified, new_pool_max, new_flags */ ceph_decode_need(p, end, sizeof(fsid) + sizeof(u32) + sizeof(modified) + |